Peerless Pump Company
P.O. Box 7026 – Indianapolis, IN 46207-7026
Phone: (317) 925-9661 – Fax: (317) 924-7388
TABLE VI (Continued)
TROUBLES
TROUBLE PROBABLE
CAUSE
REMEDY
Overload on driver
Pump speed high.
Total head lower than rating
Liquid is of higher specific gravity or
viscosity than rating.
Mechanical trouble of pump or driver.
Motor voltage higher than name plate rating will
cause the motor to run faster. Either reduce motor
voltage or trim impeller diameter. On other drives,
reduce speed if possible. If speed reduction not
realized, trim impeller diameter.**
Check suction and discharge pressures and
determine the total dynamic head. If total head
lower than ratings, throttle discharge to rated total
head or, if this is not possible, reduce impeller
diameter.**
Check with Peerless distributor to determine if a
larger motor is required.
See if pump and motor turn freely. Check impeller
fit, shaft straightness and ball bearings.
Pump vibrates or is noisy
Driver unbalanced.
Misalignment
Cracked foundation.
Worn ball bearings.
Disconnect driver and operate it alone. Check
pump for large pieces of debris, such as wood,
rags, etc.
Realign pumping unit.
Replace foundation.
Replace bearings. Check lubricants for proper
grade. Check pump alignment.
**Always obtain new trim diameter from Peerless Pump Company representative.
SPARE PARTS. To keep delays to a minimum when
pump repairs are required, we suggest that the following
spare parts be stocked:
(a) One set of bearings (16) & (18), bearing seals (47) &
(169), and bearing cover gaskets (73B).
(b) One set of shaft sleeves (14) & (14A) and sleeve O-
rings (14B).
(c) One set of casing rings (7).
(d) One set of impeller rings (8).
(e) One casing gasket (73A).
(f) One set of mechanical seals (65 & 80), and gland
O-rings (17C).
For installations where downtime is critical, a complete
rotating element should be stocked.
To obtain quick and accurate service when ordering
spare parts, provide the following information:
(A) Pump size and type as noted on nameplate.
(B) Pump serial number as noted on nameplate.
(C) The name and number of the parts as shown on
the sectional drawings.
(D) Quantity required of each item.
Aid may be obtained from the Peerless Pump Company
representative or an authorized distributor for planning
an adequate supply of spare parts.
NOTICE: Materials of construction, specifications, dimensions, design features, and application information, where
shown in this bulletin, are subject to change and/or modification without notice by Peerless Pump Company at their
option.
BULLETIN NO. 4851959
8
